Truth and Punishment are Entirely Different Messages and thus are Born by Entirely Different Messengers

I submit that it is impossible to be the bringer of Truth and the Bringer of punishment, because these two things are mutually exclusive.

If your concern yourself with Truth, then you cannot concern yourself with FORCE, which is contrary to Truth. Speaking Truth to people is to accept that individuals possess their own Will, Moral Agency, and Self. Therefore, you can only seek to convince them, not to force them.